Machine for making corrugated paper



May 19, 1953 l c'. D LNncx-HE MACHINE FQR AMuxms- CORRUGATED PAPER FiledFeb. g4, i951 Patented May 19, 1953 MACHINE FOR MAKING CORRUGATED PAPERCharles D. Nitchie, Haddonfeld, N. J., assignor to Samuel M. LangstonCo., Camden, N. J., a corporation of New Jersey Application February 24,1951, Serial No. 212,659

9 Claims.

In the manufacture of single faced corrugated paper it has been thestandard practice for many years to pass one of the sheets between apair of intermeshing fluted rolls to corrugate it; to -apply transversestripes of adhesive to one of the sheets, and to then press thecorrugated sheet and a facing sheet together. Although the adhesive isusually applied to the crowns of the corrugations while the sheet is onthe surface of one corrugating roll, as shown in Sieg Patent 1,835,816,it may be applied in stripes to the facing sheet, as shown in Goettsch21,531,036. The facing sheet and the corrugated `sheet are then pressedtogether between a smooth faced roll and one of the corrugating rolls.As the pressure is applied only along the line of tangency of the tworolls, and the sheets are traveling at a rapid rate, it often occursthat the adhesive does not become set sufficiently while under pressure,and the two sheets may spring apart at one or more of the corrugationsafter the pressure is relieved. Thus an unsatisfactory product isproduced, particularly when the machine is operated at high speed toproduce a maximum product per hour.

It has been proposed to press the two sheets togetherfor a longer periodof time by means of a belt following along at least one-half of theperiphery of one of the corrugating rolls, as shown in the Ferres Patent545,354c and McPike et al. Patent 972,121. In such constructions it isdiflicult to thread up the machine for starting operation, and so far asI am advised, such machines have not been found to be practical, and arenot now in use.

The main object of my invention is to provide a mechanism whereby thepressing belt may be readily moved to inoperative position to facilitatethreading up of the machine, and then moved to operative position whereit is applied to the sheets along an arc of the desired length.

A further object is to provide means whereby the pressure belt is keptunder uniform tension regardless of the length of the arc in which it isdeected from a straight line of travel while acting on thev assembledsheets.

As an important feature of my invention, at least one of the beltcarrying rollers may be moved to such a position that the belt is freeof theY paper, or merely tangent to one of the rolls,

. to permit threading up of the machine. As it may be held in,'diiferent positions, it is possible to vary the length of the arcalong which the belt operates on the assembledsheets. Asa furtherfeature, means are providedwhereby the tensionvonV 2 the belt is keptconstant in all positions of aci-- justment.

In carrying out my invention I provide an end'- less belt which may besubstantially as wide as the paper being operated upon, and press onerurr of the belt onto the facing sheet along a desired portion of theperiphery of one of the corrugating rolls on which the sheets arebrought together. The belt is mounted on a pair of rollers, one of whichmay be bodily moved to bring the belt to inoperative position tofacilitate threading up of the machine, and may be held in differentpositions to vary the arc along which it applies pressure to theassembled sheets.

As a further feature I provide an idler roll kspaced from thecorrugating roll to a distance less than the diameter of the beltsupporting rolls.

Thus, slack produced by moving the belt away from the corrugating rollis taken up and the tension on the belt is kept constant, regardless ofthe length of the arc along which it acts on the sheets..

A machine embodying my invention is shown in the accompanying drawing,in which:

Fig. 1 is a vertical longitudinal section through a machine embodying myinvention.

. Fig. 2 is an end view of the belt tensioner, intermediate parts oftransverse members being broken away, and

Fig. 3 is a section similar to a portion of Fig. 1, and showing andalternative mounting of the belt.

In the machine illustrated a sheet of paper A is delivered over idlerrolls I0, II and I2. and thence over a corrugating roll I3 and betweenit and al second corrugating roll I4. Glue or other adhesive in a pan orother vessel I5 is picked up by a roll I6, the excess is wiped off by aroll I'I, and the glue is applied to the corrugated sheet A as it passesalong the underside of the corrugating roll I4. The corrugated sheet iskept in contact with the roll I4 by curved fingers I8 which may lie ingrooves on the periphery of the glue transfer roll I6. The facing sheetB is directed into contact with and pressed against the adhesive bearingsurface of the corrugated sheet A while the latter is on roll I4. To theextent above described, the machine may be of any well known andconventional type.

In carrying out my invention as shown in Figs. l and 2, I provide a pairof belt pulleys 2| and 2li Journaled in a frame formed primarily of apair of arms 22 which may be journaled on the shaft 23 of the pulley 2|.`These pulleysare spaced at some distance apart, and carry a belt 25which is preferably of a width as great as that of the ,Staged irait toa, distante Subsien Opposite to the corrugatingirll Inllbtxheredistmounted an idler I4', preferably of the same ydj1 arneter, the spacingof the two rolls vbeing less than the diameter of the pulleyst-2 Iandrilflhus in threading up the machine-the .rolli24-may.be

arms are swung on shaft g3asagenter. the arms 22 are moved to differentposition the slack resulting from moving the belt away frorn the roll I4is taken upkby the roll It', and the -=tensin. .en. .the melts :isekeptcepstant. regardless of the adjusted position of the armsgZnand thebelt. "r'fhe facinge-sheetandi the.. c orrugated sheet are held,2together :during-.al1ofthe-periods .while the .belt .is .pressing`thetwo;sheetsagainst .the corrugatingroll Ibandftheglue has an adequetetime. in which. .to `set.

' allor. swinging :the-larme .andi-.lioldngeiihem ,ein ,-adjusted.positiom-.one or, bothpf, .the arms-may 4`.have anextension 2B at ;-itslower end,l andi-below the. shaft.l 23 and theextension hasta. curved.gear i sectioni Meme/shing-.witha vpinion awhich maylberotatedbytahandwheel; 3D. .LA spring :pressed pin 29 may engage.theteethof ithepini'on .to norl.mally..hoid: it-.against. rotation.-.Thus. the.,.arms may-be swung-.inx eitheridirectiomand. to thepo-1.sitiondesiredpbyimeans of the hand.\vheel. -rThe `.pin29,:beingespring pressed, will .permitlsuch i' forced adjust/nient; but`normally. willhold vthe pin'ieinagainstf freer-.rotation-ands thus holdAthe tion in respect to the corrugating reni-114,. .with theL two -sheetspressed `together along-:- the de sired arc- -to permit usetting of the,adhesive.

HTo-threadup Ltheeniachine the. hand .wheel 30 is rotated to--mo've--therollA 124-tol the` dotted :line -lpcsit-ioir 24a,- and-with :thebelt=25-awayifrom the corrugating-roll I 4, and `l:thefacing-@sheet-j-B-. is Iedwin overa guideplate 3L `Atte"rstartir-ig, .the arms-2 2-are-adjusted-tothe desired Aposition to cause vthe-.fasi @sheet andgthecorrugated A'sheet te beheld -togetl'ier.forA the desired distance alongfthe periphery ofthe corrugatingroll-Id. theiv glue or' otherdhesivehastime to set, and

a more satisfactory product is made-thancanfbe made on old typeAmachine---where -th epressing element holds the sheets ltogetheronlyvwliilethey make line contact.

-5Topull-the assembled -pairA of sheets from the machine 'iheifemar 'i eand -el -m mintedl oripairs of rolls 42,543 and .ihenai .SettingOMP-e..eeiiesireeiiegire :.fil er A time forv the adhesive to se withthe corrugated roll ofleach4 pair Amaybe driven, 'although 'someAinstancesthel beltsJ are movedy by f frictional..

-1-5 moved to the position indicated by 24a as the be Aprovided a pairof belts L the shaft 24 of upper pulley 24 journaled inthe frame, andshaft 33 of the lower pulley 2I journaled in the arms 22. I have alsoshown gear section 21 somewhat longer, and carried by a 5 shorter arm26. In both forms one pulley of the shaft may be driven to give the beltthe same speedasthei sheet. lin-.Frigezlphaye shown theshart.-.2s.riven,:by gearslas, ,31,.thegsnaft of the gear 31 being thatof the corrugating roll I4.

L,1,0 Similar driving means may be provided for driv-Lingutlole,stra/iftl24"of Fig. 3 from the shaft of the corrugating rollI3.

From the drawing and the foregoing descrip- ,-tionpit.willbeseenthat thebelt holds the sheets together-.for an appreciable time, that the beltmay be moved. away to facilitate threading up, and thqtenlsion on thebelt is kept constant due to the fact that the spacing of corrugating.rolt I4 and the idler I4' is less than the diameter of the pulleys 2Iand 24.

Having mus. desti" d-,ir.iy..i.i.1yei.iti.0ii..w1iei I .claim as andsire to .sreiiieelbv 'fftteiusi frate-itis; -1 A mahiiieaieigiiialsiiie.,sii-isle;.fafseii. semi- .gated paper. i .including .a`pair f neilillfg .eorrugating :c ,ollsfor corrugaiting, one u sheet, Va,.moyable frame ndernloer. havingl a5 pair Aof.. spaced110115,...3.beimarnedby said-tast mentionedeffells .means vforadjusting: 'Ghia PQiDI.1..0 'd "'fime Amember. whereby saidbeltpressesafai egsheet ...Grito the ,corrugated sheetalorgg. ated' are.of the peripherycf one ofdsad Corrugat g'Qrolls, andmeans for.maintaining.. the.. tension .of the 'l.beltconstantregardless 0f:theleneth iredfam .2. A. machine; for `iriaising. single@faccedfcprrugatedpaper, of. ,the typeliaving a prair efi nter `.meshingcorrugating rolls fior .,corrugati-ng lone sheet,.means.forapplyingadhesive to the.l of.v the .corrugationswzhle engagingl,one,.of

aid

t 40 rolls, a, belt .for. pressing. a; facingsheet onto. the

adhesive coatedtcrowns of. the, `cerrugated sheet,

. apairofrolls .for .supporting,saidfpeltwandmeans .fonmovingone ofsaidrolls tQyaly fthe-d tance along which ithe. sheets. arepressedtogetheLand 45.,.,means for. holdine' v.Said belt under l,uniform ten-.sion 1.iritits different, adjustempositions.

.. 3. ,.A. .inachine; ,forv makingv single@ ged. Lf :yosrrugated.peper., .including a painpiunter hing sheet while the llatteris'vinfngagement w'it one l A'of NsaidMfhlulted Vrc lls,` a; pivtdfyfane'having a -pairwofmidler 0pulleys one bing'atlthe pivotal n center )ofUAsaid rfifa'rie, an `endless belt supported by said pulleys, a'v third--idler Troll .of Asubstantially the i sameA diameter as said .lastmentionedjluted --roll and spacedtherefrom-to alistai'celflessthan thediameterof. saididlerrollmwhereby .said .belt

i iskeptunder.substantia11y.constant. .tension'in4different,adjustedepositions, andfvmea 'for .ad-

sheet against the corrugated sheet along a desired portion of theperiphery of one of said fluted rolls.

5. A machine for making single faced corrugated paper, including a pairof fluted rolls for corrugating a sheet, means for applying adhesive tothe crowns of the corrugations in said sheet while the latter is inengagement with one of said uted rolls, a pivoted frame having a pair ofidler pulleys, one being at the pivotal center of said frame, an endlessbelt supported by said pulleys, said frame having a curved gear sectionconcentric with its pivotal center, and means engaging said gear sectionto resist but permit swinging of said frame.

6. A machine for making single faced corrugated paper, including a pairof uted rolls for corrugating a sheet, means for applying adhesive tothe crowns of the corrugations in said sheet while the latter is inengagement with one of said fluted rolls, a pivoted frame having a pairof idler pulleys, one being at the pivotal center of said frame, anendless belt supported by said pulleys, said frame having a curved gearsection concentric with its pivotal center, and a spring pressed pinengaging said gear section to resist but permit swinging of said frame.

7. A machine for making single faced corrugated paper, including a pairof fluted rolls for corrugating a sheet, means for applying adhesive tothe crowns of the corrugations in said sheet while the latter is inengagement with one of said fluted rolls, a pivoted frame having a pairof idler pulleys, one being at the pivotal center of said frame, anendless belt supported by said pulleys, said frame having a curved gearsection concentric with its pivotal center, a pinion engaging said gearsection, and means for rotating said pinion to swing said frame.

8. A machine for making single faced corrugated paper, including a pairof fluted rolls for corrugating a sheet, means for applying adhesive tothe crowns of the corrugations in said sheet while the latter is inengagement with one of said fluted rolls, a movable frame having a pairof idler pulleys, an endless belt supported by said pulleys, said framehaving a lcurved gear section concentric with its pivotal center, and aspring pressed pin engaging said :gear section to resist but permitswinging of said arm.

9. A machine for making single faced corrugated paper, including a rollfor corrugating a sheet following a portion of the periphery of saidroll, a pair of pulleys, a belt supported by said pulleys for pressing afacing sheet against said corrugated sheet along a predetermined arc ofsaid corrugating roll, means for adjusting the position of one of saidpulleys to vary the length of said arc, and means for maintaining thetension on said belt uniform in its different adjusted positions.

CHARLES D. NITCI-IIE.

ReferencesCited in the lle of this patent UNITED STATES PATENTS NumberName Date 545,354 Ferres Aug. 27, 1895 972,121 McPike et al. Oct. 4,1910 1,179,941 Langston Apr. 18, 1916 1,180,828 Crane Apr. 25, 19161,327,158 Hawkins Jan. 6, 1920 1,855,503 White Apr. 26, 1932 FOREIGNPATENTS Number Country Date 380,189 Great Britain Sept. 15, 1932

